CVE-2025-3584Public exploitNetwork attack vector

Authenticated stored XSS via welcome-page content

Published Jun 3, 2025 · Updated Jun 3, 2025

Stored XSS in Newsletter before 8.8.2 allows remote authenticated users to inject scripts through Subscription welcome-page content. The setting stores raw HTML and renders event-handler code without sanitization or output escaping when a later plugin form submission displays the welcome page. Access to the Subscription settings and a configuration that denies unfiltered_html are required; the injected script runs in the submitting user's browser.

CVSS severity4.8
Medium
EPSS probability0.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Stored XSS in Newsletter before 8.8.2 allows remote authenticated users to inject scripts through Subscription welcome-page content. The setting stores raw HTML and renders event-handler code without sanitization or output escaping when a later plugin form submission displays the welcome page. Access to the Subscription settings and a configuration that denies unfiltered_html are required; the injected script runs in the submitting user's browser.

The record

CVE
CVE-2025-3584
Published
Jun 3, 2025
Updated
Jun 3, 2025
Vendor
Stefano Lissa
Product
Newsletter
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Jun 3, 2025CVE publishedPublication date reported by the CVE source.
  2. Jun 3, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <8.8.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Stefano Lissa · Newsletterversion=0 <8.8.2

Published CVSS scores

4.4WordfenceCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N
4.8CVE record via OSVCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007JavaScript/JScript

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo